You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Optical illusions often go viral on social media, but they've been around long before Twitter. From ...

But you might be surprised to learn that this is an optical illusion that long predates the smartphone. Known as Pepper's ...

Optical illusions are taking over the internet. Already a favorite pastime for many on social media, these brain teasers are making waves. If you like optical illusions, this viral challenge will test ...

The optical illusion challenge for today is a difficult one, with only a handful of people being able to crack it. In this beautiful landscape, you need to find a cat hidden somewhere in the image. Do ...

A viral optical illusion challenges viewers to spot a hidden dog in a mind-bending image that first looks like an old man.

Everyone loves an optical illusion — even if they leave us completely stumped — and they're all around us in the natural world. From an underwater waterfall in the Indian Ocean to a surrealist scene ...

Medical imaging experts are adept at solving common optical illusions, according to new research. The research is the first to show that people can be trained to do better at solving visual illusions, ...

In the past few years, the internet has given us The Dress, a photo of a mysterious missing leg, and this disorienting floor design. If you're still hungry for more, INSIDER rounded up a mix of ...

A Reddit parent has left internet users scratching their heads with a mind-boggling game of hide-and-seek. Shared under the wildly popular “Find the Sniper” thread, the image looks like nothing more ...

In this Ebbinghaus illusion of relative size perception, the orange circle on the left looks bigger than the one on the right - but it is actually 10 per cent smaller. In a new study, medical imaging ...